Remove sdk-tree that cannot be updated.
Squashed 'framework/joomla/com_istribute/admin/sdk/' content from commit d90a357

git-subtree-dir: framework/joomla/com_istribute/admin/sdk
git-subtree-split: d90a3574c3a3eb7a4cbba490e6c614d44dfb06f6
Merge commit 'ff281258e2f2f71c50d37fdbc66897793d97028e' as 'framework/joomla/com_istribute/admin/sdk'